CT — Ischemie mezenterică (MCB)
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MCB Radiology — 8 Mesenteric Ischemia
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- 2026-09-27
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Documentul original MCB — Ischemie mezenterică
Protocol · 4 pagini · consultat la 2026-09-27.
Descarcă PDF-ul integral · Sursa MCB · Catalogul MCB pentru această modalitate
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Textul documentului original
Pagina 1 — text în engleză
Updated 03/09/25 CTA Mesenteric Ischemia Reviewed 05/14/25 Indications - mesenteric ischemia, celiac or superior mesenteric artery stenosis, chronic abdominal pain, abdominal pain after eating, intestinal/mesenteric angina. Use CT Angio Combo AP w/ + w/o Contrast charge. Do not use CT AP w/ + w/o Contrast charge. GENERAL SCAN NOTES Move the patient's arms over his/her head if possible. Remove any metal from the imaging field of view. Topogram - lung bases through pubic symphysis (obtained during end inspiration). Craniocaudal scan coverage - lung bases through pubic symphysis on all phases (obtained during end inspiration). Adjust FOV (field of view) on topogram to smallest without cropping anatomy. IV Contrast: Administer weight-based Omnipaque-350 - 1 mL/kg up to 150 mL (100 mL minimum). Inject at 4 mL/sec followed by 40 mL saline flush, 20-gauge or larger in forearm or more proximal. Bolus track off proximal abdominal aorta triggered at 120 HU. Oral Contrast: If the patient can tolerate, give him/her 24 oz water 30 mins prior to imaging. For GE scanners, it is essential for the 1st recon thickness on the scanner to match the 1st recon thickness in this protocol book for the prescribed Noise Index to be valid. The 1st recon should generally be the thickest recon in the protocol.
Pagina 2 — text în engleză
CTA Mesenteric Ischemia SIEMENS PARAMETERS & RECONS For the Pre Contrast and Venous (70 secs) phases: Scan
Care
Scan
Mode kV mAs Care
Dose Pitch Acq Coll Rot kV & Lvl Time Time Sensation 16 spiral 120 200 on 0.80 16 1.5 NA 0.5 13.0 Go Up 32 spiral 130 92 on 0.80 32 0.7 0.8 on 145 22.3 Sensation 64 spiral 120 200 on 1.20 24 1.2 NA 0.5 7.2 Definition 64 spiral 120 180 on 0.60 64 0.6 0.5 21.7 off Go Top 64 spiral 120 112 on 0.80 64 0.6 on 145 0.5 8.1 Drive 128 spiral 120 147 on 0.60 128 0.6 0.5 on 10.9 Force 192 spiral 120 147 on 0.60 192 0.6 on 0.5 7.2 For the Arterial phase: Scan
Care
Scan
Mode kV mAs Care
Dose Pitch Acq Coll Rot kV & Lvl Time Time Sensation 16 spiral 120 200 on 0.80 16 0.75 NA 0.5 26.0 Go Up 32 spiral 130 92 on 0.80 32 0.7 0.8 on 145 22.3 Sensation 64 spiral 120 200 on 1.20 64 0.6 NA 0.5 5.4 Definition 64 spiral 120 180 on 0.60 64 0.6 0.5 on 21.7 Go Top 64 spiral 120 112 on 0.80 64 0.6 on 145 0.5 8.1 Drive 128 spiral 120 147 on 0.60 128 0.6 0.5 on 10.9 Force 192 spiral 120 147 on on 0.60 192 0.6 0.5 7.2 PRE CONTRAST PHASE Recon
Name of Series Thick Interval Kernel Window IR
Lvl Direction AX PRE 3.0 3.0 Br40 / B41f mediastinum 3 head/feet ARTERIAL PHASE AX ARTERIAL 3.0 3.0 Br40 / B41f mediastinum 3 head/feet SAG ARTERIAL 3 3.0 3.0 Br40 / B41f mediastinum left/right AX ART MIPS 5.0 3.0 mediastinum head/feet Br40 / B41f 3 3D VRT (& spin) 0.75 0.5 CT angio Bf37f / B31f VENOUS PHASE (70 secs) AX VENOUS 3.0 3.0 Br40 / B41f mediastinum 3 head/feet COR VENOUS 3.0 3.0 Br40 / B41f mediastinum 3 front/back SAG VENOUS 3.0 3.0 Br40 / B41f mediastinum 3 left/right
Care
Scan
Mode kV mAs Care
Dose Pitch Acq Coll Rot kV & Lvl Time Time Sensation 16 spiral 120 200 on 0.80 16 1.5 NA 0.5 13.0 Go Up 32 spiral 130 92 on 0.80 32 0.7 0.8 on 145 22.3 Sensation 64 spiral 120 200 on 1.20 24 1.2 NA 0.5 7.2 Definition 64 spiral 120 180 on 0.60 64 0.6 0.5 21.7 off Go Top 64 spiral 120 112 on 0.80 64 0.6 on 145 0.5 8.1 Drive 128 spiral 120 147 on 0.60 128 0.6 0.5 on 10.9 Force 192 spiral 120 147 on 0.60 192 0.6 on 0.5 7.2 For the Arterial phase: Scan
Care
Scan
Mode kV mAs Care
Dose Pitch Acq Coll Rot kV & Lvl Time Time Sensation 16 spiral 120 200 on 0.80 16 0.75 NA 0.5 26.0 Go Up 32 spiral 130 92 on 0.80 32 0.7 0.8 on 145 22.3 Sensation 64 spiral 120 200 on 1.20 64 0.6 NA 0.5 5.4 Definition 64 spiral 120 180 on 0.60 64 0.6 0.5 on 21.7 Go Top 64 spiral 120 112 on 0.80 64 0.6 on 145 0.5 8.1 Drive 128 spiral 120 147 on 0.60 128 0.6 0.5 on 10.9 Force 192 spiral 120 147 on on 0.60 192 0.6 0.5 7.2 PRE CONTRAST PHASE Recon
Name of Series Thick Interval Kernel Window IR
Lvl Direction AX PRE 3.0 3.0 Br40 / B41f mediastinum 3 head/feet ARTERIAL PHASE AX ARTERIAL 3.0 3.0 Br40 / B41f mediastinum 3 head/feet SAG ARTERIAL 3 3.0 3.0 Br40 / B41f mediastinum left/right AX ART MIPS 5.0 3.0 mediastinum head/feet Br40 / B41f 3 3D VRT (& spin) 0.75 0.5 CT angio Bf37f / B31f VENOUS PHASE (70 secs) AX VENOUS 3.0 3.0 Br40 / B41f mediastinum 3 head/feet COR VENOUS 3.0 3.0 Br40 / B41f mediastinum 3 front/back SAG VENOUS 3.0 3.0 Br40 / B41f mediastinum 3 left/right
Pagina 3 — text în engleză
CTA Mesenteric Ischemia GE PARAMETERS & RECONS For the Pre Contrast, Arterial and Venous (70 secs) phases: Scan
Smart
Slice
Beam
Dose
Scan
Type SFOV kV mA
Range Noise
Index mA Thick Coll Pitch Speed Rot
Time Red ASIR Time LS 16 16.36 helical large 120 50-440 on 2.5 20 1.375 27.50 0.6 NA NA 10.9 Opt 540 helical on 2.5 20 1.375 large 120 50-440 16.36 27.50 0.6 NA NA 10.9 LS VCT 64 helical large body 120 50-650 16.36 on 2.5 40 1.375 55.00 0.5 50 50 4.5 Disc VCT 64 helical large body 120 50-650 16.36 on 2.5 1.375 55.00 0.5 NA NA 40 4.5 PRE CONTRAST PHASE Window
Recon
Name of Series Thickness Interval Recon
Algorithm Width/Level Direction AX PRE 2.5 2.5 std full 400/40 head/feet Must be first recon. ARTERIAL PHASE AX ARTERIAL 2.5 2.5 std full 400/40 head/feet Must be first recon. SAG ARTERIAL 2.5 2.5 std full 400/40 left/right AX ART MIPS 5.0 3.0 std full 400/40 head/feet 3D VRT (spin) 0.625 0.625 std full 400/40 VENOUS PHASE (70 secs) AX VENOUS 2.5 2.5 std full 400/40 head/feet Must be first recon. COR VENOUS 2.5 2.5 std full 400/40 front/back SAG VENOUS 2.5 2.5 std full 400/40 left/right
Smart
Slice
Beam
Dose
Scan
Type SFOV kV mA
Range Noise
Index mA Thick Coll Pitch Speed Rot
Time Red ASIR Time LS 16 16.36 helical large 120 50-440 on 2.5 20 1.375 27.50 0.6 NA NA 10.9 Opt 540 helical on 2.5 20 1.375 large 120 50-440 16.36 27.50 0.6 NA NA 10.9 LS VCT 64 helical large body 120 50-650 16.36 on 2.5 40 1.375 55.00 0.5 50 50 4.5 Disc VCT 64 helical large body 120 50-650 16.36 on 2.5 1.375 55.00 0.5 NA NA 40 4.5 PRE CONTRAST PHASE Window
Recon
Name of Series Thickness Interval Recon
Algorithm Width/Level Direction AX PRE 2.5 2.5 std full 400/40 head/feet Must be first recon. ARTERIAL PHASE AX ARTERIAL 2.5 2.5 std full 400/40 head/feet Must be first recon. SAG ARTERIAL 2.5 2.5 std full 400/40 left/right AX ART MIPS 5.0 3.0 std full 400/40 head/feet 3D VRT (spin) 0.625 0.625 std full 400/40 VENOUS PHASE (70 secs) AX VENOUS 2.5 2.5 std full 400/40 head/feet Must be first recon. COR VENOUS 2.5 2.5 std full 400/40 front/back SAG VENOUS 2.5 2.5 std full 400/40 left/right
Pagina 4 — text în engleză
CTA Mesenteric Ischemia PHILIPS PARAMETERS & RECONS For the Pre Contrast, Arterial and Venous (70 secs) phases: Scan
Dose
3D
Scan
Mode kV Avg
mAs Index Dose Pitch Detect Colli Rot Time Time Incisive 128 helical 20 on 1.00 64 0.625 0.75 120 115 9.4 PRE CONTRAST PHASE Name of Series Thick Interval Filter Window iDose Recon
Direction AX PRE 3.0 3.0 B mediastinum 3 head/feet ARTERIAL PHASE AX ARTERIAL 3.0 3.0 B mediastinum 3 head/feet SAG ARTERIAL 3.0 3.0 B mediastinum 3 left/right AX ART MIPS 5.0 3.0 B mediastinum 3 head/feet 3D VRT (spin) 0.75 0.5 B VENOUS PHASE (70 secs) AX VENOUS 3.0 3.0 B mediastinum 3 head/feet COR VENOUS 3.0 3.0 B mediastinum 3 front/back SAG VENOUS 3.0 3.0 B mediastinum 3 left/right
Dose
3D
Scan
Mode kV Avg
mAs Index Dose Pitch Detect Colli Rot Time Time Incisive 128 helical 20 on 1.00 64 0.625 0.75 120 115 9.4 PRE CONTRAST PHASE Name of Series Thick Interval Filter Window iDose Recon
Direction AX PRE 3.0 3.0 B mediastinum 3 head/feet ARTERIAL PHASE AX ARTERIAL 3.0 3.0 B mediastinum 3 head/feet SAG ARTERIAL 3.0 3.0 B mediastinum 3 left/right AX ART MIPS 5.0 3.0 B mediastinum 3 head/feet 3D VRT (spin) 0.75 0.5 B VENOUS PHASE (70 secs) AX VENOUS 3.0 3.0 B mediastinum 3 head/feet COR VENOUS 3.0 3.0 B mediastinum 3 front/back SAG VENOUS 3.0 3.0 B mediastinum 3 left/right